# URL : https://yukicoder.me/problems/no/1243
T = int(input())

for _ in range(T):
    A, B = map(int, input().split())
    AA, BB = A, B
    res = []
    mx = 0
    while A < B:
        if A % (1 << (mx + 1)) != 0:
            if A + (1 << mx) > B:
                d = B - A
                for j in range(64, -1, -1):
                    if d & (1 << j):
                        if mx < j:
                            for k in range(1 << (j - mx)):
                                res.append(1 << mx)
                        else:
                            res.append(1 << j)
                break
            else:
                res.append(1 << mx)
                A += 1 << mx
        mx += 1
    print(len(res))
    print(*res)
    # # checkans
    # for i in res:
    #     assert(AA % i == 0)
    #     AA += i
    # else:
    #     assert(AA == BB)